Form for sewers and the like.



G. G. r.' BoswBLL.

oRMPPoR swnns AND THB LIKE.

APPLIULTIOH FILED FEB. 14. 907- v George G Eoswen.

following is a full, clear, and exact description thereof,

GEORGE el E, B oswELL, or LAWRENCE, INDIANA..

lFont/r Fort snwnns Ann THE- LIKE.

Specication of Letters Patent Patented Nov. '5, 1907.

Applinntinn filed February 14. 1907. Serial No. 357,354.

- To all 'whom it 'may concern: p

Be it known that I, GEORGE G. F. BoswELi, oi Lawrence, county of Marion, and State of Indiana, have invented a certain new land useful Form'ior Sewers and the Like', and I do hereby declare that the reference being had to the accompanying drawings, in which like letters refer to like par-ts.

The object of this invention is to improve the'con struction of sewer orrns to make thenr more' convenient to manipulate and 'to adjust them to sewers of various sizes.

The nature of the invention will be understood from the accompanying drawingsand the following descriptionandclaims'.' l

In the drawings Figure l is a transverse vertical section of a sewer and a sewer form in place, 'the latter being shown in side elevation and parts being broken away. Fig.' 2 is a side elevation of a portion of the brace and means for securing its inner end in place, parts being broken away and the inner holder being shown by dotted lines. Fig. 3 is a transverse section of the brace and side elevation of the inner holder and the clamp, the holder being partlybroken away. Fig. 4 is an elevation ofthe inner concave surface oi one of the mold or form plates. Fig. 5 is a plan view of one of the braces with means at the outer end for engaging the mold or form plates. Fig. 6 is a longitudinal section of what is shown in Fig. l, near one edge and through the inner holder and clamping plate.

In thefirst place, after the sewer trench has been dug, a concrete bottom` 10 is put in place and upon that the orm is erected. What may be termedv two inner holders 11 are secured to two vertical posts l2. These holders are curved and extended so as to be nearly semicircular. n Ihey yare made of T-iron and,

therefore, havetwo anges at right angles to each the parts-12l and 13 together. The upper ends` of the- Vto other. In the upper part of said inner holders there is a hole through' which a rod or pi p\e,13 passes, said rod or pipe at its'lower end entering the tubular post 12. Through holes 14 pins are inserted for fastening holders ll'are connected by a turnbuckle 15, and the upper ends of "thel rods 13 are connected by another turnbuckle 16. By these' turnbuckles said parts can l be heldin place "and adjusted as-neetled. There is also a. turnbuckle 17 .at the lower\ end of the tubular posts 12, the endsof said turnbuckle being secured caster rodsto the right vthe tubular posts 12 and the'- rods 13 may be forced upward to tighten andy strengthen the parts of the form. By turning said caster rods to the left, thc tubular posts 12 and rods 13 may be lowered for adj ustinent of the parts oi the form or to 'modify forms of sewers, or for the purpose of collapsing and removing the form. Braces 20 extend 'outward from.' the inner holders 11 in any desired number. lTheyare likewise madeof T-iron with a series of notches 21 along each astride the braces 2O and-have projections 123 that extend into the notches 2-l'of the braces 20 and fingers 23 'that project towards each other parallel with the fas'- Atener and claspy the edges of the inner'holders, as seen in Figs. l and 2. Therefore, these.. fasteners 22 lit' loosely on the holder 11 and after being located on the angular plates substantially as shown in Fig. 3, that fit braces 20 are slipped longitudinally on the inner.

may be shortened 1to any extent so as to make-a sewer. Vform of thel desired size.' To the outer endsl or' the braces 2'0 there are secured plates 25 adapted to project through the slots 26 in the mold plates 27. On their outer endssaid plates have curved heads 28 centrally pivoted. A number 0i' holes29 are provided on the plate 25 to receive a pin 30 so as to secure the plate 25 adjustably to the brace 20, and the plates 27 are clamped between the head 28 and the end of the brace 20. The plates 27 overlap each other, the slotted edge of one plate overlapping theV smooth edge of the adjah cent plate. The plate 25 and head 28, therefore, bind.

the overlapping edges of the plates 27 together-and hold them .in position. .The crown plate' 130 is separate,

resting upon `the plates 27 on each vside and upon the-` The plates 27 are concave, and their concavity' is increased to .adapt them t0.small sewers by two bars 3l with their adjacent ends overlapping and fastened to gether by a pin 32, and their outer ends being secured to the plate 27 so as to span said plate. By applying some force to the edges of the plate, it may be curved more andthe curvature maintained-and held by the bars 31 and pin 32. After the sewer formisv placed,

1. A form for sewers and the like including a pair of segmental inner holders, radially extendingbraces with its notched edges, fasteners for adiustably securing saidbraces to the holders, said fasteners consstingvo a plzite extending over said brace with four extensions projectlng,- through notches in said'hrac'eand overlapping said inner holder, and mold plates held in position by .the outer ends of said braces.

2. A form fonsewers and the like, including a central forni, outwardly `extending* braces, concave mold plates v notched on one side with the notched edge of one plate overlapping the adjacent edge of the next plate, the outer ends oi said brace'sA adapted to extend through said notches, and a pivoted head on thevouter end of each brace adapted tocinrnpv said plates against the end of the brace.

3. A form for' sewers and the, like, includingapair of segmental inner holders, a pair of teiescoplng posts connected with the ends thereof, turnbnckles connecting the ends of the posts and also the ends of the inner holders ,smesssuhstantially as set forth, mold plates, and means extending from snid lnner holders for holding the mold plates in place.

4. A form for sewers and the like including a parof segmental inner holders T-Shaped in cross-section, a pnir of vertical teiescoping posts extending through one flange of each segmental holder near its upper end, turnbucklcs connecting the ends of said posts and the ends of said inner holders, s crown plate mounted upon the upper end of said posts, other concave mold plates, and m'eans for holding said mold plates ln place.'

In witness whereof, I have hereunto ailixed my signature in the presence of the witnesses herein named. f

GEORGE G. F. BOSWELL.

Witnesses;

N. ALLEMQNG, W. M. GENTLE. 

